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Jahnsite-(MnMnMn): MnMnMn2Fe+++2(PO4)4(OH)2·8(H2O)
Comments: Brownish red aggregate of jahnsite-(MnMnMn). Location: Stewart Mine, Near Pala, San Diego Co., California, USA. Scale: Specimen Size 8x5x4 mm. © Sergey Vasiliev / Systematic Mineralogy
Karupmollerite-Ca: (Na,Ca,K)2Ca(Nb,Ti)4(Si4O12)2(O,OH)4·7(H2O)
Comments: Small white fragment of kaupmollerite-Ca in a geletin capsule. Location: Mellemelv, Ilimaussaq, Greenland. Scale: Capsule Size 1 cm. © Sergey Vasiliev / Systematic Mineralogy
Kokchetavite: KAlSi3O8
Comments: Fragment of eclogite containing kokchetavite which occurs as inclusions in clinopyroxene and garnet (see inset BSE images). Location: Kumde-Kul Area, Kokchetav Massif, Kokchetav Oblast', Kazakhstan. Scale: Specimen Size 6x6x6 mm. © Sergey Vasiliev / Systematic Mineralogy
Kuliokite-(Y): (Y,REE)4Al(SiO4)2(OH)2F5
Comments: White encrustations of kuliokite-(Y) grains on pegmatite. Location: Ploskaya Mt., Western Keivy, Kola Peninsula, Russia. Scale: Specimen Size 14x10x8 mm. © Sergey Vasiliev / Systematic Mineralogy
Kurgantaite: CaSr[B5O9]Cl·(H2O)
Comments: Crystal fragment of white kurgantaite on sticky stuff. Location: Korshunovskoye Deposit, Transbaikal, Irkutsk District, Russia. Scale: Specimen Size 6x3x2 mm. © Sergey Vasiliev / Systematic Mineralogy
Kyanoxalite: Na7(Al5-6Si6-7O24)(C2O4)0.5-1.0·5H2O
Comments: Small aggregate of white kyanoxalite crystals in matrix. Location: Karnasurt Mt. Lovozero Massif, Kola Peninsula, Russia. Scale: Sample Size 15x8x6 mm. © Sergey Vasiliev / Systematic Mineralogy
Labyrinthite: (Na,K,Sr)35Ca12Fe3Zr6TiSi51O144(O,OH,H2O)9Cl3
Comments: Rose-colored crystal fragment of labyrinthite. Location: Koashva Mt., Khibiny Massif, Kola Peninsula, Russia. Scale: Crystal Size 3 mm. © Sergey Vasiliev / Systematic Mineralogy
Magnesioastrophyllite: K2Na[Na(Fe++,Fe+++,Mn)Mg2]Ti2Si8O26(OH)4F
Comments: White chalky mass of magnesioastrophyllite in matrix. Location: N'orkpakhk Mt., Khibiny Massif, Kola Peninsula, Russia. Scale: Specimen Size 35 x 25 x 10 mm. © Sergey Vasiliev / Systematic Mineralogy
Magnesiostaurolite: [ ]4Mg4Al16(Al,[ ])2Si8O40[O6,(OH)2]
Comments: White crystals of magnesiostaurolite in rose quartz. Location: Dora Maira Massif, Cuneo Province, Piedmont, Italy. Scale: Specimen Size 42 x 27 x 25 mm. © Sergey Vasiliev / Systematic Mineralogy
Mitryaevaite: Al5[(PO4)2[(P,S)O3(OH,O)]2F2(OH)2(H2O)8·6.48(H2O)
Comments: Small grain of white mitryaevaite on sample holder. Location: Northwestern Karatau range, Kazakhstan. Scale: Peg Size 2 mm. © Sergey Vasiliev / Systematic Mineralogy
Natrophosphate: Na7(PO4)2F·19(H2O)
Comments: Specimen of natrophosphate sealed into a plastic box. Location: Koashva Mt., Khibiny Massif, Kola Peninsula, Russia. Scale: Specimen Size 2x1.5x1 cm. © Sergey Vasiliev / Systematic Mineralogy
Nechelyustovite: (Ba,Na)2{(Na,Ti,Mn)4[(Ti,Nb)2O2Si4O14](OH,O,F)2}·4.5H2O
Comments: Nechelyustovite aggregate. Location: Kirovsky Mine, Kukisvumchorr Mt, Khibiny Massif, Kola Peninsula, Russia. Scale: Grid Size 1 mm. © Sergey Vasiliev / Systematic Mineralogy
Neskevaaraite-Fe: NaK3Fe(Ti,Nb)4(Si4O12)2(O,OH)4·6(H2O)
Comments: Aggregate of brown neskevaaraite-Fe crystals. Location: Neskevaara Hill, Vuoriyarvi Massif, N.Karelia, Russia. Scale: Specimen Length 5 mm. © Sergey Vasiliev / Systematic Mineralogy
Obertiite: NaNa2(Mg3Fe+++Ti)Si8O22(O,F,OH)2
Comments: Pinkish grains of obertiite in matrix. Location: Bellerberg Mt., Eifel District, Rheinland-Phalz, Germany. Scale: Specimen Size 7x6 mm. © Sergey Vasiliev / Systematic Mineralogy
Olgite: Na(Sr,Ba)PO4
Comments: Green mm-sized olgite crystals in matrix. Location: Kedykverpakhk Mt., Lovozero, Kola, Russia. Scale: Not Given. © Sergey Vasiliev / Systematic Mineralogy
Pellouxite: (Cu,Ag)Pb10Sb12S27(Cl,S)0.6O
Comments: Dark metallic pellouxite grains in matrix. Location: Buca della Vena mine, Ponte Stazzemese, Alpi Apuane, Stazzema, Lucca, Toscana, Italy. Scale: Specimen Size 12x12x7 mm. © Sergey Vasiliev / Systematic Mineralogy
Penobsquisite: Ca2Fe++[B9O13(OH)6]Cl·4(H2O)
Comments: Clear crystal of penobsquisite. Location: Inder B deposit and salt dome, Atyrau Oblysy, Kazakhstan. Scale: Crystal Size 7x6x4 mm. © Sergey Vasiliev / Systematic Mineralogy
Peprossiite-(Ce): (Ce,La)(Al3O)2/3B4O10
Comments: Yellow grains of peprossiite-(Ce) on matrix. Location: Sacrofano Caldera, Campagnano, Lazio, Italy. Scale: Specimen Size 11x4x4 mm. © Sergey Vasiliev / Systematic Mineralogy
Philolithite: Pb12O6Mn(Mg,Mn)2(Mn,Mg)4(SO4)(CO3)4Cl4(OH)12
Comments: Dark green mass of philolithite. Location: Langban, Värmland, Sweden. Scale: Specimen Size 7x5x3 mm. © Sergey Vasiliev / Systematic Mineralogy
Phosphoinnelite: Ba4Na3Ti3Si4O14(PO4,SO4)2(O,F)3
Comments: Yellowish inclusions of phosphoinnelite in matrix. Location: Kovdor Phlogopite Quarry, Kovdor Massif, Kola Peninsula, Russia. Scale: Specimen Size 15x10x8 mm. © Sergey Vasiliev / Systematic Mineralogy